∴PI=AB-BP-AI=6-x-1.5=9/2-x∴Rt△PIO中,OP2=PI2+OI2=x2-9x+(153)/4∵⊙P与⊙O外切,∴OP=√(x^2-9x+(153)/4)=x+y∴y=√(x^2-9x+(153)/4)-x=1/2√(4x^2-36x+153)-x∵动点P在边AB上,⊙P经过点B,交线段PA于点E.∴定义域:0<x≤3,(3)由题意得:∵点E在线段AP...
【题目】如图,平行四边形ABCD中,已知AB=6,BC=9,.对角线AC、BD交于点O.动点P在边AB上,⊙P经过点B,交线段PA于点E.设BP=x. (1)求AC的长; (2)设⊙O的半径为y,当⊙P与⊙O外切时,求y关于x的函数解析式,并写出定义域; (3)如果AC是⊙O的直径,⊙O经过点E,求⊙O与⊙P的圆心距OP的长. ...
解:(1)由题意得:a=-6,b=2, ∴AB=2-(-6)=8; (2)∵2x+1=3x-9 解得:x=10 ∴点C对应的数为10, ∵BC=10-2=8,AB=2-(-6)=8, ∴BC+AB=12=PA+PB 设点P的对应数为m, ①当P在A左侧时,-6-m+2-m=12,解得,m=-8; ②当P在A右侧时,6+m+m-2=12,解得,m=4; ...
如图,在平面直角坐标系中,O为坐标原点,P(x,y),PA⊥x轴于点A,PB⊥y轴于点B,C(a,0),点E在y轴上,点D,F在x轴上,AD=OB=2FC,EO是△AEF的中线,AE交PB于点M,-x+y=1.(1)求点D的坐标;(2)用含有a的式子表示点P的坐标;(3)图中面积相等的三角形有几对?
9.如图,在三棱锥P-ABC中,$∠APB=90°,∠CPA=∠CPB=60°$.PA=PB=PC=2,点D,E,F满足PD=DB,PE=2EA,AF=FC,则直线CE与DF所成的角为 -解:在Rt△PCD中,∵∠CPA=∠CPB=60°,∴∠PCD=30°,∴∠PDE=∠PCD+∠CPA=90°,∴四边形PEDF是矩形,∴∠PDE=∠PFD=90°,∴∠PDE+∠PFD+∠CPA=180°,即...
(2)若点Q是PA与y轴的交点,且四边形PQOB的面积是5/6,AB=2,试求点P坐标,并写出直线PA与PB的解析式 直线PA与y轴的交点为Q,那么y=x+n=0+n=n 所以,点Q(0,n) 过点P作x轴的垂线,垂足为C,则:PC=(m+2n)/3 那么,△PAB的面积S1=(1/2)*AB*PC=(1/2)*2*(m+2n)/3=(m+2n)/3 ...
e=m%3D2%26s%3Dtv0FotEQCBQcQipKwQzePOeEDrYVVa64REOHN%2B0iJT23bLqV5UHdqQ5IlIa038mrlg6AtVBcXjxPfi2lVBRm5MIOi9KwcbTvp5iDj62SqGCyGsxEs2RaHf8dztsG9W1fyJhvCCkM%2FW2ffEX7oKPAhBgTmpddr06WlYDYGv4Q%2BZYAY7w7IJyQ%2BYn4x5fK1A4XGmDUDdUtIECiZ%2BQMlGz6FQ%3D%3D...
You can differentiate between the run typesPPandPM. Depending on the run type, the archiving objectPA_PIDXarchives entries in different tables that belong to the selected posting runs: The tablePCALAC(Selection of Posted Payroll Results) is archived but remains in the database. ...
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英译中文1.他爷爷每天看电视. His grandfather___ ___ every day. 2.史密斯先生不做运动. Mr Smith doesn't___ ___ . 3.我收集了很多书. I have a great___ ___books. 4.你有更多的纸吗? Do you have___ ___ pa